LXR linux/drivers/gpu/drm/nouveau/nouveau

   1// SPDX-License-Identifier: MIT
   2#include <linux/pagemap.h>
   3#include <linux/slab.h>
   4
   5#include "nouveau_drv.h"
   6#include "nouveau_mem.h"
   7#include "nouveau_ttm.h"
   8
   9struct nouveau_sgdma_be {
  10        /* this has to be the first field so populate/unpopulated in
  11         * nouve_bo.c works properly, otherwise have to move them here
  12         */
  13        struct ttm_dma_tt ttm;
  14        struct nouveau_mem *mem;
  15};
  16
  17static void
  18nouveau_sgdma_destroy(struct ttm_tt *ttm)
  19{
  20        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  21
  22        if (ttm) {
  23                ttm_dma_tt_fini(&nvbe->ttm);
  24                kfree(nvbe);
  25        }
  26}
  27
  28static int
  29nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
  30{
  31        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  32        struct nouveau_mem *mem = nouveau_mem(reg);
  33        int ret;
  34
  35        ret = nouveau_mem_host(reg, &nvbe->ttm);
  36        if (ret)
  37                return ret;
  38
  39        ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
  40        if (ret) {
  41                nouveau_mem_fini(mem);
  42                return ret;
  43        }
  44
  45        nvbe->mem = mem;
  46        return 0;
  47}
  48
  49static void
  50nv04_sgdma_unbind(struct ttm_tt *ttm)
  51{
  52        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  53        nouveau_mem_fini(nvbe->mem);
  54}
  55
  56static struct ttm_backend_func nv04_sgdma_backend = {
  57        .bind                   = nv04_sgdma_bind,
  58        .unbind                 = nv04_sgdma_unbind,
  59        .destroy                = nouveau_sgdma_destroy
  60};
  61
  62static int
  63nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *reg)
  64{
  65        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  66        struct nouveau_mem *mem = nouveau_mem(reg);
  67        int ret;
  68
  69        ret = nouveau_mem_host(reg, &nvbe->ttm);
  70        if (ret)
  71                return ret;
  72
  73        nvbe->mem = mem;
  74        return 0;
  75}
  76
  77static struct ttm_backend_func nv50_sgdma_backend = {
  78        .bind                   = nv50_sgdma_bind,
  79        .unbind                 = nv04_sgdma_unbind,
  80        .destroy                = nouveau_sgdma_destroy
  81};
  82
  83struct ttm_tt *
  84nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
  85{
  86        struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
  87        struct nouveau_sgdma_be *nvbe;
  88
  89        nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
  90        if (!nvbe)
  91                return NULL;
  92
  93        if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA)
  94                nvbe->ttm.ttm.func = &nv04_sgdma_backend;
  95        else
  96                nvbe->ttm.ttm.func = &nv50_sgdma_backend;
  97
  98        if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) {
  99                kfree(nvbe);
 100                return NULL;
 101        }
 102        return &nvbe->ttm.ttm;
 103}
 104